You are looking at a specific version 20200218:090813 of this paper. See the latest version.

Paper 2020/191

Lattice-Inspired Broadcast Encryption and Succinct Ciphertext-Policy ABE

Zvika Brakerski and Vinod Vaikuntanathan

Abstract

We propose a candidate Ciphertext-Policy Attribute Based Encryption (CP-ABE) scheme for circuits, with ciphertext size that depends only on the depth of the policy circuit (and not its size). This, in particular, gives us a Broadcast Encryption (BE) scheme where all parameters (in particular, the size of the keys and ciphertexts) have a poly-logarithmic dependence on the number of users, a task that was only known to be achievable assuming ideal multilinear maps or indistinguishability obfuscation. Our construction relies on techniques from lattice-based (and in particular LWE-based) cryptography, but we are unable to provide a security proof. We analyze some attempts at cryptanalysis.

Metadata
Available format(s)
PDF
Category
Foundations
Publication info
Preprint. MINOR revision.
Keywords
Broadcast encryptionciphertext-policy ABElatticeslearning with errors
Contact author(s)
vinodv @ mit edu
History
2021-04-26: revised
2020-02-18: received
See all versions
Short URL
https://ia.cr/2020/191
License
Creative Commons Attribution
CC BY
Note: In order to protect the privacy of readers, eprint.iacr.org does not use cookies or embedded third party content.